I2C Water Level Sensor (10cm)

Products & Technology
#1

Hi There,

I have three 10cm Water Level Sensors Grove - Water Level Sensor | Seeed Studio Wiki I am having difficulty in getting them to communicate correctly when using a multiplexer.
The multiplexer sees them all when I run I2C scanner. And I can get each of them to read individually but not together.
I would appreciate any help, if someone has completed this already.

#include <Wire.h>

#ifdef ARDUINO_SAMD_VARIANT_COMPLIANCE
#define SERIAL SerialUSB
#else
#define SERIAL Serial
#endif

unsigned char low_data[8] = {0};
unsigned char high_data[12] = {0};

#define NO_TOUCH       0xFE
#define THRESHOLD      100
#define ATTINY1_HIGH_ADDR   0x78
#define ATTINY2_LOW_ADDR   0x77

// Select I2C BUS/////////
/////////////used this from TCA9548A adafruit online tutoroal/////////////////
    void TCA9548A(uint8_t bus) {

  Wire.beginTransmission(0x70);
  Wire.write(1 << bus);
  Wire.endTransmission();
  Serial.print(bus);
}
///////////////////////////////////////////////////////////////
void setup() {
  SERIAL.begin(115200);
  Wire.begin();
  TCA9548A(0);
  
  TCA9548A(1);
}
void getHigh12SectionValue(void)
{
  memset(high_data, 0, sizeof(high_data));
  Wire.requestFrom(ATTINY1_HIGH_ADDR, 12);
  while (12 != Wire.available());

  for (int i = 0; i < 12; i++) {
    high_data[i] = Wire.read();
  }
  delay(10);
}

void getLow8SectionValue(void)
{
  memset(low_data, 0, sizeof(low_data));
  Wire.requestFrom(ATTINY2_LOW_ADDR, 8);
  while (8 != Wire.available());

  for (int i = 0; i < 8 ; i++) {
    low_data[i] = Wire.read(); // receive a byte as character
  }
  delay(10);
}

void check()
{
  int sensorvalue_min = 250;
  int sensorvalue_max = 255;
  int low_count = 0;
  int high_count = 0;
  while (1)
  {
    uint32_t touch_val = 0;
    uint8_t trig_section = 0;
    low_count = 0;
    high_count = 0;
    getLow8SectionValue();
    getHigh12SectionValue();

    for (int i = 0; i < 8; i++)
    {
      if (low_data[i] >= sensorvalue_min && low_data[i] <= sensorvalue_max)
      {
        low_count++;
      }
      if (low_count == 8)
      {
    }
    for (int i = 0; i < 12; i++)
    {
      if (high_data[i] >= sensorvalue_min && high_data[i] <= sensorvalue_max)
      {
        high_count++;
      }
      if (high_count == 12)
      {
    }
    for (int i = 0 ; i < 8; i++) {
      if (low_data[i] > THRESHOLD) {
        touch_val |= 1 << i;
      }
    }
    for (int i = 0 ; i < 12; i++) {
      if (high_data[i] > THRESHOLD) {
        touch_val |= (uint32_t)1 << (8 + i);
      }
    }
    while (touch_val & 0x01)
    {
      trig_section++;
      touch_val >>= 1;
    }
    TCA9548A(0);
    SERIAL.print("water level1 = ");
    SERIAL.print(trig_section * 5);
    SERIAL.println("% ");
    SERIAL.println(" ");
    SERIAL.println("*********************************************************");
    delay(1000);
     
    TCA9548A(1);
    SERIAL.print("water level2 = ");
    SERIAL.print(trig_section * 5);
    SERIAL.println("% ");
    SERIAL.println(" ");
    SERIAL.println("*********************************************************");
    delay(1000);
  }
}
  }
}
///////////////////////////////////////////////////////////////

void loop(){
  check();
}